will not accelerate

[m1n3r]

New user name forgot my old one.
On to my 98 2 door 5.7

Got in the truck this morning and started just fine. pull on the road everything is fine til I hit 200rpm and the engine just lags and stumbles. i end up getting up by grannying it all the way. it still shifts. When i got home i put the truck in nuetral and it revs just fine.

Im lost! any ideas? maybe torque converter or some sort of shift accuator?
Help!?!?!?!?

---------- Post added at 07:45 AM ---------- Previous post was at 07:44 AM ----------

2000rpm

 

[SunlitComet]

was this 2000 rpm limit in any gear you could reach. which gears could you get?

 

[m1n3r]

yes it happened in all gears. was really bad up hill. curiosity was killing me so i took it for another spin. climbed a hill and it was legging badly. got to the top and started costing down. gave it a couple pumps of the throttle to see if the downholl had the same effect. heard something like a valve opening and closing and the truck lost power and would not start just crank and crank. must be the fuel pump cause now when i turn my ignition to the on position it doesnt whine or prime like it used to. i think i'll try the filter and relay first but damn the pumps are spendy

 

[SunlitComet]

you have a 1998 unit so just stick a pressure gauge on the test port on top of the engine first. you may or may not need a new filter the gauge will help a lot more then you think.

 

[m1n3r]

it was the fuel pump. Ordered the delphi unit off amazon for my 2 door. A bit over 200 but well worth it